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Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
I was going to have bought a new drill press today but I got rained out so postponed it. I was wondering if any other 4hvers had drill presses and what success they've had when trying to drill PCBs using carbide bits?
Also has anyone tried using a 2 axis vise to allow them to do extremely low duty milling?
Registered Member #347
Joined: Sat Mar 25 2006, 08:26AM
Location: Vancouver, Canada
Posts: 106
If you're drilling PCBs, a Dremel drill press and Dremel tool are what you want (or a purpose designed PCB drill press, but those are usually expensive). Full size drill presses don't go fast enough, and it would be very easy to break the bit.
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
Its going to be tough for me to justify buying both a drill press (for larger holes, chassis/heatsink, and slight metal milling), and the dremel press. My 'dremel' is a Canadian Tire branded mastercraft one which I'm not sure would even fit.
What is the recommended RPM that I would want to have the bit moving at regardless of the tool?
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
Spin your drill as fast as you can, those carbide bits are designed for 30K+ rpm
I have my dremel mounted on a linear slide (spring loaded up) which works great for me. You don't really need the whole drill press, just a way to keep the bit strait and not moving arround.
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
I suppose my priority first is to get my drill press, I can drill PCBs using HSS bits if absolutely neccessary while still being able to drill holes in aluminum heatsinks, instead of only being able to do PCB holes without being able to do anything else...
Registered Member #63
Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
Yeah, the Proxxon 28481 will really only handle up to 3.175mm drills; I actually use a hand-drill for everything but PCB work. It works wonders on a small apartment balcony with a stepped drill bit for enclosures, aluminium heatsinks, copper-cladding or ABS boxes.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
Been using a press with a 2 axis table for 9 years for my one-off boards. The bearings are shot now because I used it for milling Aluminium, so I can't use carbide drills anymore. That's not a terrible big deal with this one because its chuck goes down to #80 drills, so I use HSS drills for most of the holes. Your problem with modern presses is that their chucks don't go down to #80, so after you snap a bunch of $3 carbide drills and realize that the HSS ones will tolerate more and are better on your pocket, you'll really go for that chuck that goes down to a #80. Unfortunately you'll need either another chuck with an arbor (micro-chuck), or a really good chuck by itself. A seperate chuck with an arbor is probably the way to go, just make sure its good quality especially for high rpm's.
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
I just remembered that somewhere in my apartment I have fairly heavy duty keyboard tray rails, so I might be able to cobble together a dremel press without shelling out the money on a big one... time will tell (I move back into the apartment in a week or so).
And @ Hazmatt: I've read that the bearings either get damaged or the spindle itself get bent causing chatter which means broken carbide bits. Could the feed direction of your material either reduce, or cause damage to the drill press?
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Drill presses?
